Siemens SIMATIC ET 200pro - Device functions; 10.1 Introduction

SIMATIC – ET 200pro motor starter
GWA 4NEB 950 5661-02 DS 04
10-1
Device functions 10
10.1 Introduction
Device function
This section describes the device functions. All the device functions have inputs
(e.g. the device parameters) and outputs (e.g. signals). The following diagram
illustrates the device functional principle:
Figure 10-1: Device functional principle
Self-protection mechanism
The motor starter protects itself against damage by means of the thermal motor
model and temperature measurements for electronic switching elements.
When the self-protection mechanism is activated:
• the brake output and the motor are switched off immediately
• The 'Switching element overload' signal is generated
The device cannot be started with ’emergency start’
Currents
All the currents (e.g. blocking current, current limits) are current values mea-
sured as a percentage of the rated operating current.
Device function
Device parameters
Inputs
Signals
Measured values
Commands
Protection
Actions
Outputs